PMID- 25647652
OWN - NLM
STAT- MEDLINE
DCOM- 20160216
LR  - 20181202
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 29
IP  - 8
DP  - 2015 Aug
TI  - Relationships Between Lower-Body Muscle Structure and Lower-Body Strength, Power, 
      and Muscle-Tendon Complex Stiffness.
PG  - 2221-8
LID - 10.1519/JSC.0000000000000858 [doi]
AB  - The purpose of this study was to determine whether any relationships were present 
      between lower-body muscle structure and strength and power qualities. Fifteen 
      elite male surfing athletes performed a battery of lower-body strength and power 
      tests, including countermovement jump (CMJ), squat jump (SJ), isometric midthigh 
      pull (IMTP), and had their lower-body muscle structure assessed with 
      ultrasonography. In addition, lower-body muscle-tendon complex (MTC) stiffness 
      and dynamic strength deficit (DSD) ratio were calculated from the CMJ and IMTP. 
      Significant relationships of large to very large strength were observed between 
      the vastus lateralis (VL) thickness of the left (LVL) and right (RVL) leg and 
      peak force (PF) (r = 0.54-0.77, p < 0.01-0.04), peak velocity (PV) (r = 
      0.66-0.83, p < 0.01), and peak jump height (r = 0.62-0.80, p < 0.01) in the CMJ 
      and SJ, as well as IMTP PF (r = 0.53-0.60, p = 0.02-0.04). Furthermore, large 
      relationships were found between left lateral gastrocnemius (LG) pennation angle 
      and SJ and IMTP PF (r = 0.53, p = 0.04, and r = 0.70, p < 0.01, respectively) and 
      between LG and IMTP relative PF (r = 0.63, p = 0.01). Additionally, large 
      relationships were identified between lower-body MTC stiffness and DSD ratio (r = 
      0.68, p < 0.01), right (LG) pennation angle (r = 0.51, p = 0.05), CMJ PF (r = 
      0.60, p = 0.02), and jump height (r = 0.53, p = 0.04). These results indicate 
      that greater VL thickness and increased LG pennation angle are related to 
      improved performance in the CMJ, SJ, and IMTP. Furthermore, these results suggest 
      that lower-body MTC stiffness explains a large amount of variance in determining 
      an athlete's ability to rapidly apply force during a dynamic movement.
FAU - Secomb, Josh L
AU  - Secomb JL
AD  - 1Strength and Conditioning and Sport Science Department, Hurley Surfing Australia 
      High Performance Center, Casuarina Beach, Western Australia, Australia; and 
      2Center for Exercise and Sport Science Research, Edith Cowan University, 
      Joondalup, Perth, Australia.
FAU - Lundgren, Lina E
AU  - Lundgren LE
FAU - Farley, Oliver R L
AU  - Farley OR
FAU - Tran, Tai T
AU  - Tran TT
FAU - Nimphius, Sophia
AU  - Nimphius S
FAU - Sheppard, Jeremy M
AU  - Sheppard JM
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - *Elasticity
MH  - Exercise Test
MH  - Humans
MH  - Leg/anatomy & histology/diagnostic imaging
MH  - Male
MH  - Movement
MH  - *Muscle Strength
MH  - Quadriceps Muscle/anatomy & histology/diagnostic imaging/*physiology
MH  - Sports/*physiology
MH  - Tendons/*physiology
MH  - Ultrasonography
MH  - Young Adult
EDAT- 2015/02/04 06:00
MHDA- 2016/02/18 06:00
CRDT- 2015/02/04 06:00
PHST- 2015/02/04 06:00 [entrez]
PHST- 2015/02/04 06:00 [pubmed]
PHST- 2016/02/18 06:00 [medline]
AID - 10.1519/JSC.0000000000000858 [doi]
PST - ppublish
SO  - J Strength Cond Res. 2015 Aug;29(8):2221-8. doi: 10.1519/JSC.0000000000000858.